8:26 a.m.
Hi Alexandre,
[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on tip/x86/mm]
[also build test WARNING on v5.10-rc3 next-20201113]
[cannot apply to tip/x86/core tip/x86/asm]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Alexandre-Chartre/x86-pti-Defer-...
base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
1fcd009102ee02e217f2e7635ab65517d785da8e
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
#
https://github.com/0day-ci/linux/commit/63533707f1058d9d8eccb278eb735d9f8...
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review
Alexandre-Chartre/x86-pti-Defer-CR3-switch-to-C-code/20201109-225007
git checkout 63533707f1058d9d8eccb278eb735d9f88fdd222
# save the attached .config to linux build tree
make W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> arch/x86/entry/common.c:38:24: warning: no previous prototype for
'return_from_fork' [-Wmissing-prototypes]
38 | __visible noinstr void
return_from_fork(struct pt_regs *regs,
| ^~~~~~~~~~~~~~~~
arch/x86/entry/common.c:223:24: warning: no previous prototype for
'do_SYSENTER_32' [-Wmissing-prototypes]
223 | __visible noinstr long do_SYSENTER_32(struct pt_regs *regs)
| ^~~~~~~~~~~~~~
arch/x86/entry/common.c:320:24: warning: no previous prototype for
'xen_pv_evtchn_do_upcall' [-Wmissing-prototypes]
320 | __visible noinstr void xen_pv_evtchn_do_upcall(struct pt_regs *regs)
| ^~~~~~~~~~~~~~~~~~~~~~~
vim +/return_from_fork +38 arch/x86/entry/common.c
37
38 __visible noinstr void return_from_fork(struct pt_regs *regs,
39 struct task_struct *prev,
40 void (*kfunc)(void *), void *kargs)
41 {
42 schedule_tail(prev);
43 if (kfunc) {
44 /* kernel thread */
45 kfunc(kargs);
46 /*
47 * A kernel thread is allowed to return here after
48 * successfully calling kernel_execve(). Exit to
49 * userspace to complete the execve() syscall.
50 */
51 regs->ax = 0;
52 }
53 syscall_exit_to_user_mode(regs);
54 }
55
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org